Loom stop motion



March 14, 1961 w. HARRIES LOOM STOP MOTION Filed March 31, 1959 T l 4 Ic l l l I l E xk ATTORNEY TOT! CONTACT 22 United States Patent O LOOMSTOP MOTION William Harries, Emmaus, Pa.

Filed Mar. 31, 1959, Ser. No. 803,187

3 Claims. (Cl. 139-370) This invention relates to looms and moreparticularly to a stop motion adapted to stop the loom when the threadinthe shuttle breaks or when the shuttle is empty. 'I'he invention isparticularly adapted to looms for weaving relatively narrow fabrics orribbon but is not limited to such materials. In practice these fabricsmust be of minimum length, and in many applications the fabric isworthless if it is not of a satisfactory length. If, therefore, thethread in the shuttle should break or run out, the entire piece that hasbeen woven may be useless.

'In `the past it has been customary to place drop wires on the warpthreads to stop the loom in the event of a breakage of the warp threads.However, a counter has been generally relied on to control the Woof orfill thread.

AAn object of the invention is to provide an automatic stop in the eventthat the quill or shuttle thread breaks or runs out so that the Weavervmay replace the quill or mend the thread before any damage is done.

In the type of loom in question the warp threads are fed through a reedto the shuttle which reciprocates laterally to weave the shuttle threadinto the warp. As the warp threads come through the reed they form ascreen. Through the action of the batten the screen of warp threads ispushed rearwardly against the reed by the pressure of the screen and theiinished fabric.

It will be understood that the type of loom under discussion is a narrowfabric loom of the general type described in Patent No. 2,470,527,issued to S. F. Siciliano on May 17, 1949, in which the battenreciprocates in and out as the shuttle moves at right angles thereto.With each movement of the shuttle ythe weft thread is fed by the shuttlethrough the warp threads and forms an additional piece of fabric. Themost forwardly position of the batten is known as the beat-up, at whichposition vthe reed is pressed against the filling thread previouslylaid. Accordingly, there is pressure against the reed at this point topress it rearwardly.

Other objects and advantages of the invention will be apparent from theaccompanying drawings in which- Fig. 1 is a front view showing apair ofshuttles in position.

Fig. 2 is a sectional view showing the batten in a rearwardly position.

Fig. 3 is a sectional view showing the batten in the forward position.

Fig. 4 is a viewV of a circuit controlling the stop motion.

This application is a continuation-impart of my application Serial No.592,303, liled on June 19, 1956, now abandoned.

Referring more particularly to the drawings, the shuttle is mounted on abatten 11. The shuttle 10 is caused to move laterally by means of thegears 12 while 65 theA batten is moved forwardly and rearwardly on thepivoted arm 14. The warp threads 15 and 16 are fed through a screen 17and when the batten is in the rearward position the Shuttle 10 passesthrough the warp threads to form the fabric 18. The threads are thenreversed as the batten 11 is moved forwardly `and the weaving continues.l

2,456,021 Prvia Dec.14,194s 2,470,527 Siciliano, May 17, 1949 2,674,277Siciliano Apr. 6, 1954 ICC In my structure I provide a pivoted ormovable reed arm 20 which is urged by means of a spring 21 against acontact member 22. When the batten is in the rearwardly position, asshown in Fig. 2, the end 23 of the arm 20 is in contact with the contactZ2. However, the circuit employed provides a micro-switch 25 operated bythe adjustable nger 26 on the arm 14. When the batten is in the rearwardposition, as shown in Fig. 2, finger 26 is out of contact with themicro-switch 25 and the circuit controlling the stop motion is broken.When the batten moves to the forward position, as shown in Fig. 3, thelinger 26 contacts the micro-switch 25 to close the circuit. At the sametime the Woven fabric 18will contact the arm 2li-to position the endthereof, 23, away from the contact 22, thus breaking the circuitcontrolling the stop motion.

It will be appreciated that in the actual operation of the loom thistakes place very rapidly and when one contact is made the other isbroken simultaneously as long as the weft thread is fed into the warp.lf, however, there should be a break in the weft thread, or if theshuttle is empty, the fabric will not press back the arm 20, and thecircuit will be closed, activating the stop motion and stopping theloom.

In order to prevent excessive voltage in the loom, a transformer 30 isprovided between the source of current 31 yand the rest of the circuit,thus reducing the circuit from 220 volts to 6. The wire 33 runs from thetransformer to the micro-switch 25, and the wire 34 runs from themicro-switch to the contact 22. These lare all connected to theelectrically operated stop motion 3S.

I claim:

shuttle carrying a filling thread and a movable reed for warp threads, abatten mounting both the reed and the shuttle, an electrical contactbetweenthe reed and the batten, a spring urging the reed forwardly toclose said contact, said reed normally being held out of contact by thepressure of the material being Woven, but closing the contact when theshuttle thread is broken or exhausted and Ythe pressure exerted on thereed released.

2. A stop mechanism for looms including a reciprocating shuttle carryinga filling thread, a movable reed, means to supply warp threads throughsaid reed, a batten mounting both the reed and the shuttle, anelectrical -contact between the reed and the batten, a spring urging thereed forwardly to close said contact, said reed normally being held outof contact by the pressure of the screen of the warp threads and thematerial being woven but closing the contact when the shuttle thread isbroken or exhausted and the pressure exerted on the reed is released.

3. In a loom having a batten and a reciprocating shuttle carrying aiilling thread, a movable reed, means to supply warp threads throughsaid reed, a stop motion for said loom, said stop motion beingcontrolled by a circuit, said circuit being energized when the batten isin the beat-up position, an electrical contact between said Vwhen thebatten is in the beat-up position, but closing s'aid oontactpwhen theshuttle thread is broken or exhausted and the reed does not contact thewoven material.

References .Cited in the iile of this patent UNITED STATES PATENTS

